Friction-clutch.



PATENTED NOV. 28, 1905.

s SHEETS-SHEET 1.

H. W. HILL. FRIGTION CLUTCH. APPLIUATION FILED MAR.15, 1905.

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105,005,550. PATENTED Nov. 28, 1905.

H. W. HILL.

FRIOTION CLUTCH.

APPLIGATION FILED 55.55.15, 1905.

No. 805,550. PATENTED NOV. 28, 1905.

H. W. HILL.

IRICTON CLUTCH. APPLIGATION FILED Mime, 1905.

3 SHEETS-SHEET 3.

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@X -/J) WinGJJeJ HARRIT W. HILL, OF CLEVELAND, OHIO.

lFFlCTlON-CLUTCH.

Specication of Letters Patent.

Patented Nov. 28, 1905.

Application filed March`15,l905. Serial No. 250,221.

To r/,Z whom, 717 77mg/ concern:

Be it known that I, HARRY W. HILL, a citi- Zen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new and useful Improvement in Friction-Clutches, ofwhich the following is afull, clear, and exact description,

reference being had to the accompanying drawings.

This invention relates to the class of friction-clutches which employ apair of inversely and radially movable jaws adapted to grasp acylindrical pulley-iiange between them.

The primary objects of the invention are to provide a strong and simpleconstruction which can be quickly assembled and initially adjusted tocause the jaws when closed to bear equally and with the desired forceupon opposite sides of the cylindrical ange and which can also be veryeasily adjusted at any time to compensate for wear.

The invention may be summarized as consisting of the construction andcombination of partshereinafter described, and pointed out delinitely inthe claims.

In the drawings, Figure l is a view of one side of the clutch-frame andone pair of jaws l mounted thereon and the parts associated with saidpair of jaws. Fig. 2 is a sectional view in the plane of line 2 2 ofFig. 1. Fig. 3 is an end view, and Fig. 4: a front View, of the outerjaw. Fig. 5 is an end view, and Fig. 6 is a front view, of the innerjaw. Fig. 7 is a side View of the two jaws in normal relationship. Fig.8 is a central sectional view of the inner jaws, and Fig. 9 is asectional view on line 9 9 of Fig. l with the jaws removed.

Referring to the parts by letters, A represents the clutch-frame orspider, whose hub a5 is to be attached to a rotatable shaft M. In theouter edge of this spider are a plurality of equally-spaced radialrecesses a, six being shown, and on one face of the spider, associatedwith each of said radial recesses, are two heavy ribs or lianges a',which are parallel with each other and with a radial line extendingcentrally through the associated recess. In the proximate faces of theseflanges are grooves a2, extending from the periphery inward a suliicientdistance. These grooves are for the purpose of guiding the jaws B and Din radial paths, and they are of suitable width for that purpose.

Thepouter jaw B has a ange b with a concave inner face fitted to thecurvature of the outer periphery of the ange o on the pulleyl C. The jawhas also a radially-extended shank b, whose edges are parallel. Thewidth of the jaw-shank is substantially eq ual to the distance betweenthe bottoms of the opposing grooves t2 in the lianges ct. The inner jawD has a liange Z with aconvex face fitted to the curvature ofthe innerperiphery of the pulleyflange c, and it also has a shank d. When theparts are assembled, the edges of these shanks ZJ and d' are in contactwith each other and are inserted in the grooves a2, which grooves are ofproper width to receive the edges of the jaw-Shanks and guide themnicely. The two jaws are moved simultaneously and inversely toward orVfrom the interposed iiange c by a rocker E, which is fulcrumed upon theframe A and is pivotally connected in the manner to be now explained onopposite sides of its fulcrum with the two jaws of a pair. This rocker Eis preferably formed of two thin wrought-metal pieces e e. This rockeris pivotally connected at one end with ears Z2 on the inner jaw D. Saidrocker is adjustably fulcrumed upon the clutch-frame. Upon theclutch-frame and associated with each pair of jaws is a flange or rib(t3, which lies between a radial recess a and the hub of the frame, andthere is a radial hole through this rib. A fulcrurn-bolt G passesloosely through this hole and its outer flattened end lies between thetwo members e of the rocker E and is pivoted thereto. Nuts g' g2 screwupon this bolt on opposite sides of said iiange and against said flange,and thereby rigidly fasten the bolt G to the frame A in any desiredrelation. By moving this bolt inward or outward the fulcrum of therocker E is correspondingly moved outward or inward. The outer jaw hasin a similar way adjustable connection with the rocker E. A boss orenlargement 53 is formed on the rear side of jaw B and there is a radialhole through said boss. A bolt K passes loosely through this hole towardthe shaft M and its flattened end lies between and is pivoted to the twomembers e and the rocker E. This bolt is rigidly connected to the outerjaw in any desired relation thereto by means of nuts t', which screwupon the bolt and against opposite sides of said boss b3.

A lever N is pivoted to the hub a5 of the clutch-frame and it isconnected by a link P with the long arm of the rocker E.

R represents a sleeve which slides upon the shaft and has a link Tpivoted to it, which link is also pivotally connected to the lever N.

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By moving this sleeve R along' the shaft the clutch-jaws (all pairsthereof) are moved to grasp or release the interposed llange c.

Clutches of this type have always more than one pair of jaws andassociated mechanism like that which is above described. The number ofpairs of jaws, however, is not material. Fig. l in the drawings, whileit shows the entire clutch frame, shows one pair of jaws mounted thereonand only the operating mechanism associated with that pair of jaws.There are, however, six radial recesses a in the clutch-frame, as shown,and it will be understood that a pair of jaws and operating mechanismlike that which has been described is associated with each of theseradial recesses.

I claim-w 1. In a friction-clutch, the combination of the clutch-frame,a pair of inversely and radially movablejaws mounted thereon, a rockerhaving a radially-adjustable fulcrum-pivot by which the rocker isconnected with said frame, pivot connecting said rocker to one of thejaws, and a radially-adjustable pivot connecting the other jaw with saidrocker on opposite side of the said fulcrum-pivot, and means foroperating said rocker.

2. In a friction-clutch, in combination, a pulley having a cylindricalflange, a clutchframe, a pair of inversely and radially movable jawsmounted upon said frame and adapted to grasp said flange between them, abolt adjustably secured to the outer jaw, a rocker, pivot-pinsconnecting' said rocker with the inner jaw and with said bolt, a boltadjustably secured to the clutch-frame, a pivot-pin connecting this boltwith the rocker ata point midway between the two pivot-pins beforementioned, and mechanism for rocking said rocker.

3. In a friction-clutch, in combination, a clutch-frame having` aplurality of radial recesses through which the rocker may pass, and thefollowing parts associated with each radial recess, to wit: two parallelribs integral with and projecting from the inner face of said frame onopposite sides of said recess, which ribs have grooves in theirproximate faces, a boss a3 integral with and projecting from the innerface of said clutch-frame, a pair of inversely and radially movable jawshaving shanks which, when in contact with scatto each other, areslidably litted in said grooves, the outer jaw having anoutwardly-projecting boss a bolt adjustably secured in said boss Z13 andextending therefrom toward the axis of the clutch, a rocker extendingthrough the recess in the frame and pivotally connected with said boltand with the inner jaw-shank, a bolt adjustably secured in boss 3 andextending therefrom away from the axis of the clutch, a pivot-pinconnecting said bolt with the rocker at a point midway between the twopivoted pins before mentioned, and mechanism for rocking said rocker.

il. In a friction-clutch, in combination, a pulley having a cylindricalflange, a clutchframe, a pair of inversely and radially movable jawsmounted upon said frame and adapted to grasp said flange between them, abolt adjustably secured to the outer jaw, a rocker, pivot-pinsconnecting said rocker with the inner jaw and with said bolt, a boltadjustably secured to the clutch-frame, a pivot-pin connecting' thisbolt with the rocker at a point midway between the two pivot-pins beforementioned, a lever pivoted to the clutchframe, a link connecting theinner end of said lever with the outer end of said rocker, aslidablesleeve, and a link connecting said sleeve with the outer end of saidlever.

5. In a friction-clutch, in combination, a clutch-frame, a pair ofinversely and radially movable jaws mounted thereon, a bolt adjustablysecured to the clutch-frame and having a flattened outer end, a boltadjustably secured to the outer jaw and having a flattened inner end,two rocker members e lying on opposite sides of said flattened boltends, three pivot-pins connecting the inner jaw-shank and both of saidflattened bolt ends with said rocker members, a link P whose outer endextends between the outer ends of the rocker members and is pivotedthereto, a lever N pivoted to the frame and to the inner end of saidlink P, a slidable sleeve R, and a link t pivotally connecting with saidsliding sleeve and with the outer end of the lever N.

In testimony whereof I hereunto aflix my signature in the presence oftwo witnesses.

HARRY W. HI LL.

Witnesses:

E. B. GILoI-IRIs'r, E. L. THURs'roN.

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